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Apache

mod_ssl_ct (link to Apache documentation) supports serving SCTs as part of the TLS handshake during HTTPS connections. At time of writing (2015-05-14) this is supported only in trunk.

Disclaimer: the following is not intended to show best (or even good) practices for configuration of openssl or Apache, but rather to document a reproducible set of instructions that work to demonstrate the module successfully returning SCTs during the TLS handshake.

For the purposes of this example, we started with a new virtual machine created in Google Compute Engine with the "ubuntu-1504-vivid-v20150422" image.